(19)
(11) EP 2 103 402 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
25.05.2011 Bulletin 2011/21

(43) Date of publication A2:
23.09.2009 Bulletin 2009/39

(21) Application number: 09155653.0

(22) Date of filing: 19.03.2009
(51) International Patent Classification (IPC): 
B28B 1/30(2006.01)
H01T 13/34(2006.01)
 B28B 3/00(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR
Designated Extension States:
AL BA RS

(30) Priority: 19.03.2008 JP 2008072000
25.12.2008 JP 2008329107

(71) Applicant: NGK SPARK PLUG CO., LTD
Mizuho-ku Nagoya-shi Aichi (JP)

(72) Inventors:
  • Honda, Toshitaka
    Aichi (JP)
  • Mizuno, Takamitsu
    Aichi (JP)
  • Sakurai, Shinichi
    Aichi (JP)

(74) Representative: Zimmermann & Partner 
Postfach 330 920
80069 München
80069 München (DE)

   


(54) Method for manufacturing an insulator for spark plug and spark plug


(57) A method for manufacturing an insulator for a spark plug is provided. The method includes: a preparing step; a press pin arranging step; a powder filling step after the press pin arranging step; a cavity blocking step after the powder filling step; a compression molding step after the cavity blocking step; a die releasing step after the compression molding step; and a press pin removing step after the die releasing step.







Search report